.FORTH File Extension

Forth language's format is based on data stack and RPN (Revers Polish Notation). A simple example of its format:

7 8 * 23 + .
79 ok

This format equals to 7 multiplied by 8 plus 23, with "." printing the result of the mathematical equation to the user terminal.

NOTE: To create a FORTH file simply rename the extension of your plain text file that contains the Forth source code.